Question

Select all of the following expressions that are equivalent to 16a+40 .

Answer 1

The first one is true
4(4a+10)  is 
16 a + 40 after distribution

The second one is also true
2(8a+20) 
16a + 40 after distribution

Third is not true
4a(4+10a) 
16a + 40a^2 after distribution

Last one is also true
8(2a+5)
16a + 40 after distribution

Hope this helps :)